614 lines
18 KiB
PHP
614 lines
18 KiB
PHP
<?php
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/*
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* $Id: Hydrate.php 1255 2007-04-16 14:43:12Z pookey $
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.com>.
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*/
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/**
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* Doctrine_Hydrate is a base class for Doctrine_RawSql and Doctrine_Query.
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* Its purpose is to populate object graphs.
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*
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*
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* @package Doctrine
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @category Object Relational Mapping
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* @link www.phpdoctrine.com
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* @since 1.0
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* @version $Revision: 1255 $
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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*/
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class Doctrine_Hydrate2
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{
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/**
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* QUERY TYPE CONSTANTS
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*/
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/**
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* constant for SELECT queries
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*/
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const SELECT = 0;
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/**
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* constant for DELETE queries
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*/
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const DELETE = 1;
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/**
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* constant for UPDATE queries
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*/
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const UPDATE = 2;
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/**
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* constant for INSERT queries
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*/
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const INSERT = 3;
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/**
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* constant for CREATE queries
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*/
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const CREATE = 4;
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/**
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* @var array $params query input parameters
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*/
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protected $params = array();
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/**
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* @var Doctrine_Connection $conn Doctrine_Connection object
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*/
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protected $conn;
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/**
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* @var Doctrine_View $view Doctrine_View object
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*/
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protected $view;
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/**
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* @var array $_aliasMap two dimensional array containing the map for query aliases
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* Main keys are component aliases
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*
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* table table object associated with given alias
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*
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* relation the relation object owned by the parent
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*
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* parent the alias of the parent
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*/
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protected $_aliasMap = array();
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/**
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* @var array $tableAliases
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*/
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protected $tableAliases = array();
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/**
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*
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*/
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protected $pendingAggregates = array();
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/**
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*
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*/
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protected $subqueryAggregates = array();
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/**
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* @var array $aggregateMap an array containing all aggregate aliases, keys as dql aliases
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* and values as sql aliases
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*/
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protected $aggregateMap = array();
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/**
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* @var Doctrine_Hydrate_Alias $aliasHandler
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*/
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protected $aliasHandler;
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/**
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* @var array $parts SQL query string parts
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*/
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protected $parts = array(
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'select' => array(),
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'from' => array(),
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'set' => array(),
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'join' => array(),
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'where' => array(),
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'groupby' => array(),
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'having' => array(),
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'orderby' => array(),
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'limit' => false,
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'offset' => false,
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);
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/**
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* @var integer $type the query type
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*
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* @see Doctrine_Query::* constants
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*/
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protected $type = self::SELECT;
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/**
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* constructor
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*
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* @param Doctrine_Connection|null $connection
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*/
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public function __construct($connection = null)
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{
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if ( ! ($connection instanceof Doctrine_Connection)) {
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$connection = Doctrine_Manager::getInstance()->getCurrentConnection();
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}
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$this->conn = $connection;
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$this->aliasHandler = new Doctrine_Hydrate_Alias();
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}
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/**
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* getTableAliases
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*
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* @return array
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*/
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public function getTableAliases()
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{
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return $this->tableAliases;
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}
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public function setTableAliases(array $aliases)
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{
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$this->tableAliases = $aliases;
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}
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/**
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* copyAliases
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*
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* @return void
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*/
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public function copyAliases(Doctrine_Hydrate $query)
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{
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$this->tableAliases = $query->getTableAliases();
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$this->aliasHandler = $query->aliasHandler;
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return $this;
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}
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/**
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* createSubquery
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*
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* @return Doctrine_Hydrate
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*/
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public function createSubquery()
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{
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$class = get_class($this);
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$obj = new $class();
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// copy the aliases to the subquery
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$obj->copyAliases($this);
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// this prevents the 'id' being selected, re ticket #307
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$obj->isSubquery(true);
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return $obj;
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}
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/**
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* limitSubqueryUsed
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*
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* @return boolean
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*/
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public function isLimitSubqueryUsed()
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{
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return false;
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}
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public function getQueryPart($part)
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{
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if ( ! isset($this->parts[$part])) {
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throw new Doctrine_Hydrate_Exception('Unknown query part ' . $part);
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}
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return $this->parts[$part];
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}
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/**
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* remove
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*
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* @param $name
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*/
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public function remove($name)
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{
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if (isset($this->parts[$name])) {
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if ($name == "limit" || $name == "offset") {
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$this->parts[$name] = false;
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} else {
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$this->parts[$name] = array();
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}
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}
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return $this;
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}
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/**
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* clear
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* resets all the variables
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*
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* @return void
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*/
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protected function clear()
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{
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$this->tables = array();
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$this->parts = array(
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"select" => array(),
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"from" => array(),
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"join" => array(),
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"where" => array(),
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"groupby" => array(),
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"having" => array(),
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"orderby" => array(),
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"limit" => false,
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"offset" => false,
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);
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$this->inheritanceApplied = false;
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$this->tableAliases = array();
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$this->aliasHandler->clear();
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}
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/**
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* getConnection
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*
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* @return Doctrine_Connection
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*/
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public function getConnection()
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{
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return $this->conn;
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}
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/**
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* setView
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* sets a database view this query object uses
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* this method should only be called internally by doctrine
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*
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* @param Doctrine_View $view database view
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* @return void
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*/
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public function setView(Doctrine_View $view)
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{
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$this->view = $view;
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}
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/**
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* getView
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* returns the view associated with this query object (if any)
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*
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* @return Doctrine_View the view associated with this query object
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*/
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public function getView()
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{
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return $this->view;
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}
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/**
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* getParams
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*
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* @return array
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*/
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public function getParams()
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{
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return $this->params;
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}
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/**
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* setParams
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*
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* @param array $params
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*/
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public function setParams(array $params = array()) {
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$this->params = $params;
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}
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/**
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* _fetch
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*
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*
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*/
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public function _fetch($params = array(), $return = Doctrine::FETCH_RECORD)
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{
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$params = $this->conn->convertBooleans(array_merge($this->params, $params));
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if ( ! $this->view) {
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$query = $this->getQuery($params);
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} else {
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$query = $this->view->getSelectSql();
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}
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if ($this->isLimitSubqueryUsed() &&
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$this->conn->getDBH()->getAttribute(Doctrine::ATTR_DRIVER_NAME) !== 'mysql') {
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$params = array_merge($params, $params);
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}
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$stmt = $this->conn->execute($query, $params);
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return $this->parseData($stmt);
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}
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public function setAliasMap($map)
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{
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$this->_aliasMap = $map;
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}
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public function getAliasMap()
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{
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return $this->_aliasMap;
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}
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/**
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* mapAggregateValues
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* map the aggregate values of given dataset row to a given record
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*
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* @param Doctrine_Record $record
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* @param array $row
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* @return Doctrine_Record
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*/
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public function mapAggregateValues($record, array $row)
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{
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// aggregate values have numeric keys
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if (isset($row[0])) {
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// map each aggregate value
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foreach ($row as $index => $value) {
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$agg = false;
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if (isset($this->pendingAggregates[$alias][$index])) {
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$agg = $this->pendingAggregates[$alias][$index][3];
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} elseif (isset($this->subqueryAggregates[$alias][$index])) {
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$agg = $this->subqueryAggregates[$alias][$index];
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}
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$record->mapValue($agg, $value);
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}
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}
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return $record;
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}
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/**
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* execute
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* executes the dql query and populates all collections
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*
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* @param string $params
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* @return Doctrine_Collection the root collection
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*/
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public function execute($params = array(), $return = Doctrine::FETCH_RECORD)
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{
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$array = (array) $this->_fetch($params = array(), $return = Doctrine::FETCH_RECORD);
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if (empty($this->_aliasMap)) {
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throw new Doctrine_Hydrate_Exception("Couldn't execute query. Component alias map was empty.");
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}
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// initialize some variables used within the main loop
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$rootMap = current($this->_aliasMap);
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$rootAlias = key($this->_aliasMap);
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$coll = new Doctrine_Collection2($rootMap['table']);
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$prev[$rootAlias] = $coll;
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$prevRow = array();
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/**
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* iterate over the fetched data
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* here $data is a two dimensional array
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*/
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foreach ($array as $data) {
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/**
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* remove duplicated data rows and map data into objects
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*/
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foreach ($data as $tableAlias => $row) {
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// skip empty rows (not mappable)
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if (empty($row)) {
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continue;
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}
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// check for validity
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if ( ! isset($this->tableAliases[$tableAlias])) {
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throw new Doctrine_Hydrate_Exception('Unknown table alias ' . $tableAlias);
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}
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$alias = $this->tableAliases[$tableAlias];
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$map = $this->_aliasMap[$alias];
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// initialize previous row array if not set
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if ( ! isset($prevRow[$tableAlias])) {
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$prevRow[$tableAlias] = array();
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}
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// don't map duplicate rows
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if ($prevRow[$tableAlias] !== $row) {
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// set internal data
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$map['table']->setData($row);
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$identifiable = $this->isIdentifiable($row, $map['table']->getIdentifier());
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// only initialize record if the current data row is identifiable
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if ($identifiable) {
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// initialize a new record
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$record = $map['table']->getRecord();
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}
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// map aggregate values (if any)
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$this->mapAggregateValues($record, $row);
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if ($alias == $rootAlias) {
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// add record into root collection
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if ($identifiable) {
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$coll->add($record);
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unset($prevRow);
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}
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} else {
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$relation = $map['relation'];
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$parentAlias = $map['parent'];
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$parentMap = $this->_aliasMap[$parentAlias];
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$parent = $prev[$parentAlias]->getLast();
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// check the type of the relation
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if ($relation->isOneToOne()) {
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if ( ! $identifiable) {
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continue;
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}
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$prev[$alias] = $record;
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} else {
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// one-to-many relation or many-to-many relation
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if ( ! $prev[$parentAlias]->getLast()->hasReference($relation->getAlias())) {
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// initialize a new collection
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$prev[$alias] = new Doctrine_Collection2($parentMap['table']);
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$prev[$alias]->setReference($parent, $relation);
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} else {
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// previous entry found from memory
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$prev[$alias] = $prev[$parentAlias]->getLast()->get($relation->getAlias());
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}
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// add record to the current collection
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if ($identifiable) {
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$prev[$alias]->add($record);
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}
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}
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// initialize the relation from parent to the current collection/record
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$parent->set($relation->getAlias(), $prev[$alias]);
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}
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// following statement is needed to ensure that mappings
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// are being done properly when the result set doesn't
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// contain the rows in 'right order'
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if ($prev[$alias] !== $record) {
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$prev[$alias] = $record;
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}
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}
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$prevRow[$tableAlias] = $row;
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}
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}
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return $coll;
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}
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/**
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* isIdentifiable
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* returns whether or not a given data row is identifiable (it contains
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* all primary key fields specified in the second argument)
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*
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* @param array $row
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* @param mixed $primaryKeys
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* @return boolean
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*/
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public function isIdentifiable(array $row, $primaryKeys)
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{
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if (is_array($primaryKeys)) {
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foreach ($primaryKeys as $id) {
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if ($row[$id] == null) {
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return false;
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}
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}
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} else {
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if ( ! isset($row[$primaryKeys])) {
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return false;
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}
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}
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return true;
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}
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/**
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* getType
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*
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* returns the type of this query object
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* by default the type is Doctrine_Hydrate::SELECT but if update() or delete()
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* are being called the type is Doctrine_Hydrate::UPDATE and Doctrine_Hydrate::DELETE,
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* respectively
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*
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* @see Doctrine_Hydrate::SELECT
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* @see Doctrine_Hydrate::UPDATE
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* @see Doctrine_Hydrate::DELETE
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*
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* @return integer return the query type
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*/
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public function getType()
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{
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return $this->type;
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}
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/**
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* applyInheritance
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* applies column aggregation inheritance to DQL / SQL query
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*
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* @return string
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*/
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public function applyInheritance()
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{
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// get the inheritance maps
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$array = array();
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foreach ($this->tables as $alias => $table) {
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$array[$alias][] = $table->inheritanceMap;
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}
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// apply inheritance maps
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$str = "";
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$c = array();
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$index = 0;
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foreach ($array as $tableAlias => $maps) {
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$a = array();
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// don't use table aliases if the query isn't a select query
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if ($this->type !== Doctrine_Query::SELECT) {
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$tableAlias = '';
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} else {
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$tableAlias .= '.';
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}
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foreach ($maps as $map) {
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$b = array();
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foreach ($map as $field => $value) {
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if ($index > 0) {
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$b[] = '(' . $tableAlias . $field . ' = ' . $value
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. ' OR ' . $tableAlias . $field . ' IS NULL)';
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} else {
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$b[] = $tableAlias . $field . ' = ' . $value;
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}
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}
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if ( ! empty($b)) {
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$a[] = implode(' AND ', $b);
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}
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}
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if ( ! empty($a)) {
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$c[] = implode(' AND ', $a);
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}
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$index++;
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}
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$str .= implode(' AND ', $c);
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return $str;
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}
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/**
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* parseData
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* parses the data returned by statement object
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*
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* @param mixed $stmt
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* @return array
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*/
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public function parseData($stmt)
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{
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$array = array();
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while ($data = $stmt->fetch(PDO::FETCH_ASSOC)) {
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/**
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* parse the data into two-dimensional array
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*/
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foreach ($data as $key => $value) {
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$e = explode('__', $key);
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$field = strtolower(array_pop($e));
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$tableAlias = strtolower(implode('__', $e));
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$data[$tableAlias][$field] = $value;
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unset($data[$key]);
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}
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$array[] = $data;
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}
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$stmt->closeCursor();
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return $array;
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}
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/**
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* returns a Doctrine_Table for given name
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*
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* @param string $name component name
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* @return Doctrine_Table|boolean
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*/
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public function getTable($name)
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{
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if (isset($this->tables[$name])) {
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return $this->tables[$name];
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}
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return false;
|
|
}
|
|
/**
|
|
* @return string returns a string representation of this object
|
|
*/
|
|
public function __toString()
|
|
{
|
|
return Doctrine_Lib::formatSql($this->getQuery());
|
|
}
|
|
}
|